Ottu Barrage stands on the Ghaggar-Hakra west of Sirsa, where the river's seasonal flow is controlled and fed into irrigation channels. It is not a scenic monument in the postcard sense, but it explains a great deal about life in this dry corner of Haryana.
Come only if you are interested in rivers, irrigation, or the rural landscape around Sirsa. The barrage also gives context to the Ghaggar-Hakra's older cultural associations, though the modern structure is firmly about water management and agriculture.